EP0797735A1 - Impeller fastening - Google Patents
Impeller fasteningInfo
- Publication number
- EP0797735A1 EP0797735A1 EP95941670A EP95941670A EP0797735A1 EP 0797735 A1 EP0797735 A1 EP 0797735A1 EP 95941670 A EP95941670 A EP 95941670A EP 95941670 A EP95941670 A EP 95941670A EP 0797735 A1 EP0797735 A1 EP 0797735A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plastic
- centrifugal pump
- impeller
- pump impeller
- thread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/34—Locking by deformable inserts or like parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
- F16D1/068—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving gluing, welding or the like
Definitions
- the invention relates to a fastening of a centrifugal pump impeller according to the preamble of claim 1.
- centrifugal pump impellers are attached to a shaft in that they are pushed with their hub bore onto a shaft end and can be pressed against a collar of the shaft by a nut to be attached to it.
- Additional components can also be used for torque transmission.
- this fastening option is disadvantageous in the case of plastic impellers, since these materials tend to flow under pressure loads.
- plastic impellers it is therefore known to use a metallic hub with a blind hole in which a thread is attached, which can be screwed onto a shaft end.
- special safety measures with the help of additional elements are required to prevent the screw connection from loosening when the direction of rotation is reversed.
- the invention is therefore based on the problem of developing a reliable fastening possibility in a centrifugal pump impeller made of plastic, which is provided with a metallic hub for the transmission of forces.
- This problem is solved with the features of claim 1.
- the plastic forming the impeller part itself serves as a securing element in that part of the thread is filled with plastic.
- a shaft end that can be screwed into the thread displaces the plastic that is partially located in the threads and is at the same time secured in its position.
- a corresponding mandrel is inserted into the threaded area of the hub part, with the aid of which the flow of the plastic into the threads can be influenced.
- Embodiments of the invention provide that the plastic arranged in the thread is formed in one piece with the plastic of the impeller part. It is also possible that the plastic impeller part closes the receiving opening of the hub part on the side facing the suction side of the impeller and partially fills the threads.
- a shaft end which can be screwed into the thread of the hub part is reliably secured against rotation by the plastic embedded in the threads.
- a groove can additionally be cut into the thread, which is injection-molded with plastic, or the metallic hub part can be provided with connecting channels which bring the plastic specifically to certain points on the thread.
- a groove in the shaft end can also be filled with plastic.
- a method for producing the centrifugal pump impeller provides that a mandrel is inserted into the receiving opening of the hub part when the impeller part is molded onto the hub part. This affects the position and shape of the cathedral
- Fig. 1 shows a section through a pump housing
- Fig. 2 is an enlarged detail.
- An impeller 2 is rotatably arranged within a lined housing 1.
- the impeller 2 consists of a hub part 3 with a continuous receiving opening 4 for a shaft end 5 to be screwed therein.
- the hub part has an additional hub disk 6 which is perforated and is extrusion-coated with plastic material, from which the impeller blading 7 is formed.
- the use of an additional hub disc 6 depends on the forces acting on the impeller. If these are low, the hub disk 6 can be dispensed with.
- the hub part 3 is screwed onto the shaft end 5 and is supported with its front end on the drive side via an intermediate ring 8 on a shaft shoulder located downstream.
- Impeller blading 7, the receiving opening 4 facing the suction area 9 is closed by the plastic of the impeller blading 7.
- a mandrel is located within the receiving opening 4. Its outer dimensions and position are selected so that a defined amount of plastic flows into that thread area or partially fills that thread area which is provided for the anti-rotation protection between shaft end 5 and receiving opening 4.
- the amount of plastic to be injected allows the shaft end to be screwed in without the hub part 3, 6 adjacent plastic blading can be pressed.
- the amount of plastic required to secure the connection is therefore dependent on the hardness of the plastic used, the geometric design of the thread and any additional groove spaces to be filled with position-securing plastic.
- the perforation 10 of the hub disk 6 serves to improve the connection between the plastic part 7 and the metallic hub disk 6 by means of those arranged in the hub part 3
- Connection channels 11 can be brought to the desired location within the receiving opening 4 during the manufacturing process of the plastic necessary for securing the connection.
- the impeller part 12 closing the receiving opening 4 on the impeller side has a pin 13 on the side facing the suction region 9.
- This pin which serves as a sprue, can have a centering effect in those cases in which the impeller 2 is provided with a suction-side cover disk 14 which is designed as an independent component. A simple centering thus results for the assembly of a two-part impeller.
- FIG. 2 shows a detail of FIG. 1 as an enlarged detail.
- a connecting channel 11 is shown therein, which is attached in the hub part 3. With the help of the connecting channel 11, the plastic of the impeller 2 can be directed to the areas of the receiving opening 4 to be secured, which interact with the shaft end 5.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4444965 | 1994-12-16 | ||
DE4444965A DE4444965A1 (en) | 1994-12-16 | 1994-12-16 | Impeller attachment |
PCT/EP1995/004780 WO1996018820A1 (en) | 1994-12-16 | 1995-12-05 | Impeller fastening |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0797735A1 true EP0797735A1 (en) | 1997-10-01 |
EP0797735B1 EP0797735B1 (en) | 1998-05-13 |
Family
ID=6536056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95941670A Expired - Lifetime EP0797735B1 (en) | 1994-12-16 | 1995-12-05 | Impeller fastening |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0797735B1 (en) |
DE (2) | DE4444965A1 (en) |
WO (1) | WO1996018820A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19800617A1 (en) * | 1998-01-12 | 1999-07-15 | Klein Schanzlin & Becker Ag | Centrifugal pump |
AU3352599A (en) * | 1999-03-23 | 2000-10-09 | Turk Elektrik Endustrisi A.S. | Insulated fan |
DE10147700A1 (en) * | 2001-09-27 | 2003-04-10 | Htp High Tech Plastics Ag Neud | Tool for producing a thermoplastic axial drive element, comprises two mould sections and sliders which can move towards each other |
GB0306238D0 (en) | 2003-03-19 | 2003-04-23 | Echlin Do Brasil Ind E Com Ltd | Method of making a pump |
DE20317573U1 (en) * | 2003-11-14 | 2005-03-31 | Gronbach Forschungs Und Entwic | Hub for fastening of rotating component on shaft consists of plastic, and outer wall of hub is designed so that hub can be connected to rotating component with positive locking |
WO2014060612A1 (en) * | 2012-10-15 | 2014-04-24 | Metalast, S.A.U. | Pump for swimming pools |
DE102014226525A1 (en) | 2014-12-19 | 2016-06-23 | Ksb Aktiengesellschaft | The centrifugal pump impeller |
DE102021118384A1 (en) * | 2021-07-15 | 2023-01-19 | KSB SE & Co. KGaA | Lightweight hydraulic design for improved 3D printability |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2232648A (en) * | 1939-01-26 | 1941-02-18 | Allen Sherman Hoff Co | Centrifugal pump structure |
US2520122A (en) * | 1949-05-25 | 1950-08-29 | Lee N Brutus | Lock nut |
US2741288A (en) * | 1950-04-15 | 1956-04-10 | Kenneth L Johnson | Thread root elastic lock means |
GB887226A (en) * | 1957-04-15 | 1962-01-17 | Goulds Pumps | Improvements in or relating to centrifugal pumps |
AT334211B (en) * | 1975-01-18 | 1976-01-10 | Bosch Siemens Hausgeraete | CENTRIFUGAL PUMP |
DE2713034C3 (en) * | 1977-03-24 | 1980-06-04 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Arrangement for fastening the impeller of a flow machine on a shaft |
US4268544A (en) * | 1978-04-03 | 1981-05-19 | The Oakland Corporation | Method of applying friction materials to threaded article |
DE7917346U1 (en) * | 1979-06-16 | 1979-11-08 | J. Richter Kg Armaturen- Und Pumpenfabrik-Apparatebau, 4152 Kempen | PUMP IMPELLER |
DE3315030A1 (en) * | 1983-04-26 | 1984-10-31 | Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim | SCREW SOCKET |
DE3346288A1 (en) * | 1983-12-21 | 1985-07-04 | Susumu Neyagawa Osaka Yamauchi | Self-locking nut, and a method for its production |
DE8519005U1 (en) * | 1985-06-29 | 1986-02-27 | KLIFA - Fahrzeugteile GmbH & Co, 6800 Mannheim | Water pump impeller |
DE3632259C2 (en) * | 1986-09-23 | 1995-11-23 | Eaton Gmbh | Method for producing a pump impeller for a coolant pump in a motor vehicle |
-
1994
- 1994-12-16 DE DE4444965A patent/DE4444965A1/en not_active Withdrawn
-
1995
- 1995-12-05 WO PCT/EP1995/004780 patent/WO1996018820A1/en active IP Right Grant
- 1995-12-05 EP EP95941670A patent/EP0797735B1/en not_active Expired - Lifetime
- 1995-12-05 DE DE59502192T patent/DE59502192D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9618820A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0797735B1 (en) | 1998-05-13 |
WO1996018820A1 (en) | 1996-06-20 |
DE59502192D1 (en) | 1998-06-18 |
DE4444965A1 (en) | 1996-06-20 |
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